基于GIS与EPANET的昌平新城再生水管网规划

再生水回用管网规划是再生水回用规划中的重要组成部分。以昌平新城为例详细介绍了再生水回用管网的规划流程,包括数据库设计、管网几何网络构建、节点规划水量计算,并应用GIS与EPANET的耦合平台进行了再生水规划管网平差计算,且对平差结果进行了分析。     

用EPANET水力模型优化乡镇供水管网

利用EPANET水力模型对常州市罗溪镇供水管网进行了水力计算,结合实际测量结果分析了管网供水压力不足的原因,并对现状管网进行了优化,满足了该镇居民对水量与水压的要求。     

A contaminant detection system for early warning in water distribution networks

Water distribution systems are spatially diverse. As such, they are inherently vulnerable to accidental or deliberate physical, chemical, or biological threats. Efficient water quality monitoring is one of the most important tools to guarantee a reliable potable water supply. A methodology and two example applications for finding the optimal layout of a detection system, taking explicitly into account the dilution and decay properties of the water quality constituents as distributed with flow, as well as the ability of the monitoring equipment to detect contaminant concentrations, are formulated and demonstrated. The detection system outcome is aimed at capturing contaminant entries within a pre-specified level of service (LOS) defined as the maximum volume of polluted water exposure to the public at a concentration higher than a minimum hazard level. The proposed methodology couples hydraulic simulations with graph theory techniques to identify a minimum set of monitoring stations that ‘covers’ the entire network for a given LOS, at a maximum degree of system invulnerability. The model developed extends a previous work of the authors through explicitly considering the deterioration and dilution of water quality as distributed with flow, and by taking into account the monitoring equipment capabilities to detect pollutant concentrations. The methodology is demonstrated using two example applications.     

基于EPANET的电厂工业水管网优化设计

以某电厂工业水管网为例,运用EPANET软件进行水力计算,通过对管段内流速的控制,精确控制管径以及节点压力,达到管网优化设计的效果,软件操作简便,计算快速准确,满足工程设计的要求。     

Extending EPANET hydraulic solver capacity with rigid water column global gradient algorithm

EPANET is one of the most commonly used open-source programs in hydraulic modelling water distribution networks (WDNs), based on steady-state and extended period simulation approaches. These approaches effectively estimate flow capacity and average pressures in networks; however, EPANET is not yet fully effective in modelling incompressible unsteady flows in WDNs. In this study, the hydraulic solver capacity of EPANET 3 is extended with the Rigid Water Column Global Gradient Algorithm (RWC-GGA) to model incompressible unsteady flow hydraulics in WDNs. Moreover, we incorporated dynamically more accurate valve expressions than the existing ones in the default EPANET code and introduced a new global convergence algorithm, Convergence Tracking Control Method (CTCM), in the solver code. The RWC-GGA, CTCM, and valve expressions are tested and validated in three different WDNs varying from simple to sophisticated set-ups. The results show that incompressible unsteady flows can be modelled with RWC-CGA and dynamic valve representations. Finally, the convergence problem due to the valve motion and the pressure-dependent algorithm (PDA) is solved by the implemented global convergence algorithm, i.e. CTCM.     

Optimal operation of multiquality water distribution systems: unsteady conditions

This paper describes the methodology and application of a genetic algorithm scheme tailor-made to EPANET, for optimizing the operation of a water distribution system under unsteady water quality conditions. The water distribution system consists of sources of different qualities, treatment facilities, tanks, pipes, control valves, and pumping stations. The objective is to minimize the total cost of pumping and treating the water for a selected operational time horizon, while delivering the consumers the required quantities at acceptable qualities and pressures. The decision variables for each of the time steps that encompass the total operational time horizon include: the scheduling of the pumping units, settings of the control valves, and treatment removal ratios at the treatment facilities. The constraints are: head and concentrations at the consumer nodes, maximum removal ratios at the treatment facilities, maximum allowable amounts of water withdrawals at the sources, and returning at the end of the operational time horizon to a prescribed total volume in the tanks. The model is explored through two example applications.     

EPANET管网分析在矿井防尘供水管网改造中的应用

为解决开滦集团崔家寨矿部分采掘工作面供水压力低, 导致防尘设施达不到预期防尘效果的问题,通过对实际矿井防尘供水管网进行合理简化处理,利用EPANET管网模型对防尘管网系统进行了水力分析,针对现有管网设计存在的问题,提出了改造设计方案,并对方案解决问题的有效性进行了验证.     

一种基于双向LSTM的供水管网漏损定位方法

传统的供水管网检漏方式存在效率低、准确率差的缺陷.应用双向LSTM(Bi-LSTM)神经网络可以很好地分析管网漏损时节点水压的变化规律,实现快速准确的漏损定位.先创建基于EPANET平台的管网水力模型,在该模型上进行管网节点漏损模拟及各时间点节点水压的获取,然后采用Bi-LSTM进行分析,最终得到漏损节点位置及各个漏损...     

An R package for reading EPANET files

The EPANET software for modeling piping networks is widely used for the design and analysis of water systems. This short communication describes epanetReader, an R package for reading EPANET files. The package reads network and simulation data in text-based file formats into R and provides summary and plotting functionality. epanetReader also introduces sparklines as a visualization of water network simulations. The package is available through the Comprehensive R Archive Network and GitHub.com.     

EPANET在煤矿井下消防、洒水设计中的应用

将EPANET模型应用于煤矿井下消防、洒水计算中,用EPANET模拟井下管网布置,依据采煤方法和井下装备等确定初始节点流量,依据初始节点水量确定初始管径,运行后可直观显示出井下管网各节点水压,确定减压装置,简化手工计算,最后达到优化设计的目的。